CN115394096A - Dynamic control method and application of pre-signal lamp of upstream flat curve section of road intersection - Google Patents

Dynamic control method and application of pre-signal lamp of upstream flat curve section of road intersection Download PDF

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CN115394096A
CN115394096A CN202211053072.3A CN202211053072A CN115394096A CN 115394096 A CN115394096 A CN 115394096A CN 202211053072 A CN202211053072 A CN 202211053072A CN 115394096 A CN115394096 A CN 115394096A
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flat curve
curve section
formula
vehicle
signal lamp
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CN115394096B (en
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张卫华
王昌胜
施康
丁恒
陈小庆
汪春
刘嘉茗
孙婷
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ANHUI CHAOYUAN INFORMATION TECHNOLOGY CO LTD
Hefei University of Technology
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ANHUI CHAOYUAN INFORMATION TECHNOLOGY CO LTD
Hefei University of Technology
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/081—Plural intersections under common control
    • G08G1/083—Controlling the allocation of time between phases of a cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

The invention discloses a dynamic control method and application of a pre-signal lamp of an upstream flat curve section of a road intersection, which are suitable for the road intersection as a signalized intersection, the signalized intersection is connected with an upstream basic road section through the flat curve section, and the pre-signal lamp is arranged at the starting point of the flat curve section, and the method comprises the following steps: 1. determining a speed limit value of the flat curve segment; 2. determining the position of a speed limit board; 3. judging whether a pre-signal lamp arranged at the starting point of a flat curve segment in the current signal period T needs to be started or not; 4. and calculating the starting time of the red light and the green light of the pre-signal lamp. The speed limit value when the vehicle enters the flat curve section is determined according to the driving sight distance and the parking sight distance when the vehicle enters the flat curve section, so that the safety when the vehicle passes a curve is ensured; the queuing length of the vehicles at the downstream signal intersection is controlled by arranging the pre-signal lamp at the starting point of the flat curve section, so that rear-end collision accidents caused by insufficient parking sight distance of the vehicles are avoided, and the traffic flow running safety is improved.

Description

Dynamic control method and application of pre-signal lamp of upstream flat curve section of road intersection
Technical Field
The invention belongs to the field of traffic management control, and particularly relates to a dynamic control method for a pre-signal lamp of an upstream flat curve section of a road intersection.
Background
The field of view and the line of sight in front of the vehicle are of great importance for the safe and efficient operation of the vehicle on a highway. The speed and the driving direction of the vehicle are selected according to whether a driver clearly sees the front road and the surrounding environment, and the driver has a far enough sight distance so as to accurately control the direction, avoid obstacles and ensure driving safety. In a flat curve road section, the speed of a driver is too high under the shielding of objects such as guardrails, roadside trees and the like, and the rear-end collision accident of a vehicle is easily caused due to insufficient parking sight distance. It is therefore necessary to control the speed of the vehicle entering the curve according to the radius of the flat curve.
When a level curve section is arranged at the upstream of the intersection, the traffic condition of the downstream signalized intersection can not be observed in time due to poor sight distance of the vehicles at the level curve section, and when the vehicles at the downstream intersection queue too long, the subsequent vehicles do not have enough parking sight distance after running out, so that the traffic safety and the traffic efficiency of the road are reduced.
Disclosure of Invention
The invention provides a dynamic control method and application of a pre-signal lamp of an upstream flat curve section of a road intersection in order to overcome the defects of the prior art, so that the speed limit value of a vehicle entering the flat curve section can be determined, and the completeness of the vehicle during bending can be ensured; meanwhile, the queuing length of the vehicles at the downstream signal intersection can be controlled, so that rear-end accidents caused by overlong queuing of the vehicles at the intersection are avoided, and the traffic efficiency can be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a dynamic control method of a pre-signal lamp of an upstream flat curve section of a road intersection, wherein the road intersection is a signalized intersection, and an entrance way of the signalized intersection is connected with an upstream basic road section through the flat curve section; the junction point of the flat curve segment and the upstream basic road segment is the starting point of the flat curve segment, and the junction point of the flat curve segment and the entrance way of the signalized intersection is the end point of the flat curve segment; the pre-signal lamp is arranged at the starting point of the flat curve segment; the method is characterized by comprising the following steps:
step 1, determining a speed limit value of a vehicle entering a flat curve section;
step 1.1, calculating the driving sight distance S of all vehicles in a flat curve section by using the formula (1) d1 ：
Figure BDA0003824058610000011
In the formula (1), R c The radius of the curve of the vehicle running on the flat curve section is calculated by the formula (2); r is 2 The radius of the inner side of the hard road shoulder is a flat curve section and is obtained by calculation according to the formula (3);
Figure BDA0003824058610000021
in the formula (2), R 1 Radius of the flat curve segment; b is a mixture of 1 The width of the central dividing strip on the flat curve section; b 2 The width of the curb belt at the outer side of the flat curve section; b is a mixture of 3 Is a flat curve segmentThe width of the upper single lane; n is the number of one-way lanes on the flat curve section;
Figure BDA0003824058610000022
in formula (3), b 4 The width of the hard shoulder on the flat curve section;
step 1.2, calculating the parking sight distance S of all vehicles in a flat curve section by using the formula (4) s1 ；
Figure BDA0003824058610000023
In the formula (4), v 0 The free flow speed of the vehicle on the upstream basic road section before the vehicle enters the flat curve section; t is the reaction time of the driver; i is the road transverse gradient of the flat curve section; mu is the longitudinal friction coefficient between the road surface and the tire; s. the 0 A minimum safe distance for the vehicle;
step 1.3 calculate the straight curve segment at the driving sight distance S by using the formula (5) d1 Length of road under l 1 ；
Figure BDA0003824058610000024
Step 1.4 if 1 ≥S s1 Then order v limit ＝v 0 Wherein v is limit The speed limit value of the vehicle entering the flat curve section;
if l 1 ＜S s1 Then make an order
Figure BDA0003824058610000025
Step 2 if v limit ＝v 0 Then, it means that there is no need to set speed limit board on the upstream basic road section;
if v is limit ＜v 0 Then, the distance l is calculated by the equation (6) 2 So as to be upstream of the flat curve section and at a distance l from the start of the flat curve section 2 The position of the speed limit plate is provided with a speed limit plate;
Figure BDA0003824058610000026
in the formula (6), a 1 Is a comfortable deceleration of the vehicle;
step 3, calculating the speed limit values v of all vehicles by using the formula (7) limit Lower parking sight distance S s2 ；
Figure BDA0003824058610000031
Calculating the maximum speed v of the vehicle in a flat curve segment by using the formula (8) max Thereby calculating the maximum speed v of the vehicle in the flat curve section using equation (9) max Down-parking apparent distance S s3 ；
v max ＝v limit +Δv (8)
Figure BDA0003824058610000032
In the equation (8), Δ v represents the fluctuation range of the speed of the vehicle on the flat curve section;
step 4, judging whether a pre-signal lamp at the starting point of the flat curve section needs to be started in the current signal period T or not;
step 4.1 calculating the parking apparent distance difference Delta S of the vehicle in the flat curve section by using the formula (10) s ；
ΔS s ＝S s3 -S s2 (10)
Step 4.2, acquiring the traffic flow Q of the signalized intersection on the upstream basic road section and the red light time length R of the signalized intersection in the current signalized cycle T T ；
Step 4.3, calculating the maximum queuing length of the signalized intersection in the current signalized cycle T by using the formula (11)
Figure BDA0003824058610000033
Figure BDA0003824058610000034
In the formula (11), l c The length of the vehicle is taken as w is the safe distance between the vehicle and the front vehicle when the vehicle is parked and queued;
step 4.4 if
Figure BDA0003824058610000035
The pre-signal lamp is not started in the current signal period T, and step 6 is executed; if it is
Figure BDA0003824058610000036
Starting the pre-signal lamp in the current signal period T, and executing the step 5;
step 5, calculating the starting time of the red light and the green light in the pre-signal light in the current signal light period T;
step 5.1 if 3 ≥ΔS s If yes, executing step 5.2, step 5.3 and step 6;
if l 3 ＜ΔS s If yes, executing step 5.4, step 5.5 and step 6;
step 5.2, calculating the time difference T between the red light starting time of the pre-signal lamp and the red light starting time of the signalized intersection in the current signal period T by using the formula (12) R So that the turn-on time t of the red light of the pre-signal lamp at the signalized intersection is ensured R The rear red light is lighted to remind the following vehicles to queue and wait in front of the pre-signal light;
Figure BDA0003824058610000041
step 5.3, calculating the time difference T between the green light starting time of the pre-signal light and the green light starting time of the signalized intersection in the current signal period T by using the formula (13) G1 And leading the green light of the pre-signal lamp to be earlier than the green light of the signalized intersectiont G1 Opening;
Figure BDA0003824058610000042
in the formula (13), S is the length of the flat curve segment; a is a 2 Comfort acceleration for the vehicle;
step 5.4, in the current signal period T, enabling the red light starting time of the pre-signal lamp to be consistent with the red light starting time of the signalized intersection;
step 5.5, calculating the time difference T between the green light starting time of the pre-signal light and the green light starting time of the signalized intersection in the current signal period T by using the formula (14) G2 And leading the green light of the pre-signal lamp to be ahead of the green light of the signalized intersection by time t G2 Opening;
Figure BDA0003824058610000043
and 6, assigning the value of T +1 to T, and returning to execute the step 4.2 for sequential execution.
The electronic device comprises a memory and a processor, and is characterized in that the memory is used for storing a program for supporting the processor to execute the dynamic control method of the pre-signal lamp, and the processor is configured to execute the program stored in the memory.
The invention relates to a computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, executes the steps of the method for dynamic control of a pre-signal lamp.
Compared with the prior art, the beneficial technical effects of the invention are as follows:
1. the speed limit value when the vehicle enters the flat curve is determined according to the driving sight distance and the parking sight distance when the vehicle enters the flat curve section, so that the completeness of the vehicle when the vehicle passes a curve is ensured; and the deceleration distance of the vehicle is calculated by using the comfortable deceleration and is used as the setting position of the speed limit plate, so that the comfort and the safety of the vehicle during deceleration in a curve are ensured.
2. In the invention, a pre-signal lamp is arranged at the starting point of the flat curve section and the distance l from the signalized intersection to the end point of the flat curve section is dynamically determined 3 Maximum queuing length of signalized intersection in current signal period T
Figure BDA0003824058610000044
And the parking sight distance difference Delta S of the vehicle in the flat curve section s The relation between the two judges whether a pre-signal lamp arranged at the starting point of the flat curve segment needs to be started or not; therefore, the rear-end collision accident caused by the fact that vehicles at the intersection queue too long to cause that subsequent vehicles do not have enough parking sight distance after being driven out of a flat curve is avoided.
3. According to the invention, under the condition that the pre-signal lamp needs to be started, the distance l from the signalized intersection to the end point of the flat curve section is used 3 And the parking sight distance difference Delta S of the vehicle in the flat curve section s The relation between the red light and the green light of the traffic light is calculated in a classification mode, and the traffic passing efficiency is improved under the condition that the traffic safety is guaranteed.
Drawings
FIG. 1 is a general flow diagram of the present invention;
FIG. 2 is a schematic view of the present invention;
FIG. 3 is a schematic drawing of a flat curve segment of the invention.
Detailed Description
As shown in fig. 2, the intersection is a signalized intersection, and an entrance lane of the signalized intersection is connected with an upstream basic road section through a flat curve section; the joining point of the flat curve section and the upstream basic road section is the starting point of the flat curve section, and the joining point of the flat curve section and the entrance way of the signalized intersection is the end point of the flat curve section; the pre-signal lamp is arranged at the starting point of the flat curve section;
as shown in fig. 1, a method for dynamically controlling a pre-signal lamp of an upstream flat curve segment of a road intersection is performed according to the following steps:
step 1 As shown in FIG. 3, according to the driving sight distance S of the vehicle in the flat curve section d1 And parking apparent distance S s1 Determining the speed limit value of the vehicle entering the flat curve section according to the relation;
step 1.1, calculating the driving sight distance S of all vehicles in a flat curve section by using the formula (1) d1 ：
Figure BDA0003824058610000051
In the formula (1), R c The curve radius of the vehicle running on the flat curve section is calculated by the formula (2); r 2 The radius of the inner side of the hard road shoulder is a flat curve section and is obtained by calculation according to the formula (3);
Figure BDA0003824058610000052
in the formula (2), R 1 Radius of the flat curve segment; b 1 The width of the central dividing strip on the flat curve section; b is a mixture of 2 The width of the curb belt at the outer side of the flat curve section; b 3 The width of a single lane on a flat curve section; n is the number of one-way lanes on the flat curve section;
Figure BDA0003824058610000053
in formula (3), b 4 The width of the hard shoulder on the flat curve section;
step 1.2, calculating the parking sight distance S of all vehicles in a flat curve section by using the formula (4) s1 ；
Figure BDA0003824058610000061
In the formula (4), v 0 The free flow speed of the vehicle on the upstream basic road section before the vehicle enters the flat curve section; t is the reaction time of the driver; i is the road transverse gradient of the flat curve section; mu is the longitudinal friction coefficient between the road surface and the tire; s. the 0 A minimum safe distance for the vehicle;
step 1.3 calculation Using equation (5)Straight curve section at driving sight distance S d1 Length of road under l 1 ；
Figure BDA0003824058610000062
Step 1.4 if 1 ≥S s1 Then order v limit ＝v 0 Wherein v is limit The speed limit value of the vehicle entering the flat curve section;
if l 1 ＜S s1 Then give an order
Figure BDA0003824058610000063
Step 2 As shown in FIG. 2, the speed limit value v is determined according to the flat curve segment limit And the speed v of the vehicle on the upstream basic section 0 The relation between the speed limit cards sets the speed limit cards; if v is limit ＝v 0 Then, it means that there is no need to set a speed limit board on the upstream basic road section;
if v is limit ＜v 0 Then, the distance l is calculated by the equation (6) 2 So as to be upstream of the flat curve section and at a distance l from the start of the flat curve section 2 The position of the speed limit plate is provided with a speed limit plate;
Figure BDA0003824058610000064
in the formula (6), a 1 Is a comfortable deceleration of the vehicle;
step 3, calculating the speed limit values v of all vehicles by using the formula (7) limit Lower parking sight distance S s2 ；
Figure BDA0003824058610000065
Calculating the maximum speed v of the vehicle in a flat curve section by using the formula (8) max Thereby calculating the maximum speed v of the vehicle in the flat curve section using equation (9) max Lower parking sight distance S s3 ；
v max ＝v limit +Δv (8)
Figure BDA0003824058610000071
In the equation (8), Δ v represents the fluctuation range of the speed of the vehicle on the flat curve section;
step 4 as shown in fig. 2, according to the distance l from the signalized intersection to the end point of the flat curve section 3 Maximum queuing length of signalized intersection in current signal period T
Figure BDA0003824058610000072
And the parking sight distance difference Delta S of the vehicle in the flat curve section s Judging whether a pre-signal lamp at the starting point of the flat curve segment needs to be started or not according to the relation between the two signals;
step 4.1 calculating the parking apparent distance difference Delta S of the vehicle in the flat curve section by using the formula (10) s ；
ΔS s ＝S s3 -S s2 (10)
Step 4.2, acquiring the traffic flow Q of the signalized intersection on the upstream basic road section and the red light time length R of the signalized intersection in the current signalized cycle T T ；
Step 4.3, the maximum queuing length of the signalized intersection in the current signalized cycle T is calculated by using the formula (11)
Figure BDA0003824058610000073
Figure BDA0003824058610000074
In the formula (11), l c The length of the vehicle is taken as w is the safe distance between the vehicle and the front vehicle when the vehicle is parked and queued;
step 4.4 if
Figure BDA0003824058610000075
The pre-signal lamp is not turned on in the current signal period T and the steps are executed6; if it is
Figure BDA0003824058610000076
Starting a pre-signal lamp in the current signal period T and executing the step 5;
step 5, calculating the starting time of the red light and the green light in the pre-signal light in the current signal light period T;
step 5.1 if 3 ≥ΔS s If yes, executing step 5.2, step 5.3 and step 6;
if l 3 ＜ΔS s If yes, executing step 5.4, step 5.5 and step 6;
step 5.2, calculating the time difference T between the red light starting time of the pre-signal lamp and the red light starting time of the signalized intersection in the current signal period T by using the formula (12) R So as to lead the turn-on time t of the red light of the pre-signal lamp at the signalized intersection R The rear red light is turned on to remind the following vehicles to queue and wait in front of the pre-signal light;
Figure BDA0003824058610000077
step 5.3, calculating the time difference T between the green light starting time of the pre-signal lamp and the green light starting time of the signalized intersection in the current signal period T by using the formula (13) G1 And the green light of the pre-signal lamp is advanced by time t compared with the green light of the signalized intersection G1 Opening;
Figure BDA0003824058610000081
in the formula (13), S is the length of the flat curve segment; a is a 2 Comfort acceleration of the vehicle;
step 5.4, in the current signal period T, enabling the red light starting time of the pre-signal lamp to be consistent with the red light starting time of the signalized intersection;
step 5.5, calculating the time difference T between the green light starting time of the pre-signal light and the green light starting time of the signalized intersection in the current signal period T by using the formula (14) G2 And the green light of the pre-signal lamp is advanced by time t compared with the green light of the signalized intersection G2 Opening;
Figure BDA0003824058610000082
and 6, assigning the value of T +1 to T, and returning to execute the step 4.2 for sequential execution.
In this embodiment, an electronic device includes a memory for storing a program that enables a processor to execute the above-described method, and a processor configured to execute the program stored in the memory.
In this embodiment, a computer-readable storage medium stores a computer program, and the computer program is executed by a processor to perform the steps of the method.

Claims (3)

1. A dynamic control method of a pre-signal lamp of an upstream flat curve section of a road intersection is disclosed, wherein the road intersection is a signalized intersection, and an entrance way of the signalized intersection is connected with an upstream basic road section through the flat curve section; the junction point of the flat curve segment and the upstream basic road segment is the starting point of the flat curve segment, and the junction point of the flat curve segment and the entrance way of the signalized intersection is the end point of the flat curve segment; the pre-signal lamp is arranged at the starting point of the flat curve segment; the method is characterized by comprising the following steps:
step 1, determining a speed limit value of a vehicle entering a flat curve section;
step 1.1, calculating the driving apparent distances S of all vehicles in a flat curve section by using the formula (1) d1 ：
Figure FDA0003824058600000011
In the formula (1), R c The radius of the curve of the vehicle running on the flat curve section is calculated by the formula (2); r is 2 Is the inner radius of a hard road shoulder of a flat curve section, anCalculated by formula (3);
Figure FDA0003824058600000012
in the formula (2), R 1 Radius of the flat curve segment; b 1 The width of the central dividing strip on the flat curve section; b 2 The width of the curb belt at the outer side of the flat curve section; b 3 The width of a single lane on a flat curve section; n is the number of one-way lanes on the flat curve section;
Figure FDA0003824058600000013
in the formula (3), b 4 The width of the hard road shoulder on the flat curve section;
step 1.2, calculating the parking sight distance S of all vehicles in a flat curve section by using the formula (4) s1 ；
Figure FDA0003824058600000014
In the formula (4), v 0 The free flow speed of the vehicle on the upstream basic road section before entering the flat curve section; t is the reaction time of the driver; i is the road transverse gradient of the flat curve section; mu is the longitudinal friction coefficient between the road surface and the tire; s 0 A minimum safe distance for the vehicle;
step 1.3 calculate the straight curve section at the driving sight distance S by using the formula (5) d1 Length of road under l 1 ；
Figure FDA0003824058600000015
Step 1.4 if 1 ≥S s1 Then order v limit ＝v 0 Wherein v is limit The speed limit value of the vehicle entering the flat curve section is obtained;
if l 1 ＜S s1 Then give an order
Figure FDA0003824058600000021
Step 2 if v limit ＝v 0 Then, it means that there is no need to set a speed limit board on the upstream basic road section;
if v is limit ＜v 0 Then, the distance l is calculated by the equation (6) 2 So as to be upstream of the flat curve section and at a distance l from the start of the flat curve section 2 The position of the speed limit plate is provided with a speed limit plate;
Figure FDA0003824058600000022
in the formula (6), a 1 Is a comfortable deceleration of the vehicle;
step 3, calculating the speed limit values v of all vehicles by using the formula (7) limit Down-parking apparent distance S s2 ；
Figure FDA0003824058600000023
Calculating the maximum speed v of the vehicle in a flat curve segment by using the formula (8) max Whereby the maximum speed v of the vehicle in a flat curve section is calculated using equation (9) max Lower parking sight distance S s3 ；
v max ＝v limit +Δv (8)
Figure FDA0003824058600000024
In equation (8), Δ v represents the fluctuation range of the vehicle speed on the flat curve section;
step 4, judging whether a pre-signal lamp at the starting point of the flat curve segment needs to be started in the current signal period T or not;
step 4.1 calculating the parking apparent distance difference delta of the vehicle in the flat curve section by using the formula (10)S s ；
ΔS s ＝S s3 -S s2 (10)
Step 4.2, acquiring the traffic flow Q of the signalized intersection on the upstream basic road section and the red light time length R of the signalized intersection in the current signalized cycle T T ；
Step 4.3, calculating the maximum queuing length of the signalized intersection in the current signalized period T by using the formula (11)
Figure FDA0003824058600000025
Figure FDA0003824058600000026
In the formula (11), l c The length of the vehicle is taken as w is the safe distance between the vehicle and the front vehicle when the vehicle is parked and queued;
step 4.4 if
Figure FDA0003824058600000031
The pre-signal lamp is not started in the current signal period T, and step 6 is executed; if it is
Figure FDA0003824058600000032
Starting the pre-signal lamp in the current signal period T, and executing the step 5;
step 5, calculating the starting time of the red light and the green light in the pre-signal light in the current signal light period T;
step 5.1 if 3 ≥ΔS s If yes, executing step 5.2, step 5.3 and step 6;
if l 3 ＜ΔS s If yes, executing step 5.4, step 5.5 and step 6;
step 5.2, calculating the time difference T between the red light starting time of the pre-signal lamp and the red light starting time of the signalized intersection in the current signal period T by using the formula (12) R So that the pre-signal lamp is turned on at the red light of the signalized intersectionStarting time t R The rear red light is lighted to remind the following vehicles to queue and wait in front of the pre-signal light;
Figure FDA0003824058600000033
step 5.3, calculating the time difference T between the green light starting time of the pre-signal lamp and the green light starting time of the signalized intersection in the current signal period T by using the formula (13) G1 And leading the green light of the pre-signal lamp to be ahead of the green light of the signalized intersection by time t G1 Opening;
Figure FDA0003824058600000034
in the formula (13), S is the length of the flat curve segment; a is 2 Comfort acceleration of the vehicle;
step 5.4, in the current signal period T, enabling the red light starting time of the pre-signal lamp to be consistent with the red light starting time of the signalized intersection;
step 5.5, calculating the time difference T between the green light starting time of the pre-signal light and the green light starting time of the signalized intersection in the current signal period T by using the formula (14) G2 And leading the green light of the pre-signal lamp to be ahead of the green light of the signalized intersection by time t G2 Opening;
Figure FDA0003824058600000035
and 6, assigning the value of T +1 to T, and returning to execute the step 4.2 for sequential execution.
2. An electronic device comprising a memory and a processor, wherein the memory is configured to store a program that enables the processor to perform the method of claim 1, and wherein the processor is configured to execute the program stored in the memory.
3. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method as claimed in claim 1.
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